Diseases of the skin and subcutaneous tissue (dermatology)

Boil

Furuncle is a purulent-necrotic inflammation of the hair follicle and surrounding tissues. The etiology is varied, mainly determined by staphylococcus or mixed microflora. The reasons for the introduction of infection are: rubbing the skin, irritation with chemicals, increased function of sweat and sebaceous glands, microtrauma, metabolic diseases.

Pyodermitis

Pyoderma (Greek pyon - pus, derma - skin) - pustular skin diseases caused by pyogenic microorganisms, mainly staphylococci, streptococci, and less often by other microorganisms.

Pigmentless nevus: causes, symptoms, diagnosis, treatment

The basis of the non-pigmented nevus is a decrease in the activity of melanocytes. The number of the latter in the skin is normal. In the cytoplasm of melanocytes, the number of melanosomes is also normal, while in keratinocytes the number of melanosomes is reduced.

Vitiligo

According to various studies, the average prevalence of vitiligo among the population worldwide is about 1%. The causes and pathogenesis of vitiligo are still unknown. Currently, the most recognized theories of the origin of vitiligo are neurogenic, endocrine and immune theories, as well as the theory of self-destruction of melanocytes.

Sarcoidosis: causes, symptoms, diagnosis, treatment

Sarcoidosis (synonyms: Benier-Beck-Schaumann disease, benign sarcoidosis, Beck's disease) is a systemic disease of unknown etiology, affecting a variety of organs and tissues, the pathomorphological basis of which is epithelial cell granuloma without signs of caseous necrosis. The disease was first described by the Norwegian dermatologist Beck (1899).

Spontaneous panniculitis: causes, symptoms, diagnosis, treatment

The causes and pathogenesis of spontaneous panniculitis have not been fully studied. Past infections, trauma, drug intolerance, pancreatic lesions, etc. are of great importance. Lipid peroxidation processes play a certain role.

Chronic ulcerative-vegetative pyoderma: causes, symptoms, diagnosis, treatment

Chronic ulcerative vegetative pyoderma is a deep form of pyoderma caused by streptococcal and staphylococcal infections. It occurs in people of any age. The development of the disease is facilitated by severe immunodeficiency conditions, leading to a decrease in the body's defenses, and a violation of the normal functional state of the skin.

Gangrene of the penis and scrotum: causes, symptoms, diagnosis, treatment

It is believed that gangrene of the penis and scrotum is caused by Staphylococcus aureus, Streptococcus, and, less commonly, Proteus. In the pathogenesis of the disease, an important role is played by sensitization to pathogens and their decay products, the development of allergies, the involvement of skin vessels, the development of ischemia and necrosis.

Chancriform pyoderma: causes, symptoms, diagnosis, treatment

Chancriform pyoderma is a bacterial skin infection resembling syphilitic hard chancre. The causative agents of the disease are staphylococci and streptococci. The disease develops when the body's defenses are reduced (immunodeficiency) and the underlying disease is not treated rationally (scabies, etc.).

Skin changes in rye: causes, symptoms, diagnosis, treatment

Erysipelas is an acute inflammation of the skin. It occurs at any age, but older people are more often affected. The causative agent of the disease is Staphylococcus aureus, group A streptococcus (Streptococcus pyogenus). The gateway to infection is any damage to the skin and mucous membranes.